FIELD: machine building.
SUBSTANCE: gas turbine blade comprises the butt, root with leading edge, trailing edge, radial external end part, pressure side, back between leading and trailing edges and cooling air channels system. Said cooling air channels system extends from the root air inlet opening over the entire root length to multiple air discharge holes in the back and to root end top leading edge. Note here that the number of air discharge holes per the area nearby end part leading edge is larger than the mean number of air discharge holes per the area at the edge top. Air discharge hole concentration at the root end part top is larger than that at pressure side than that at the back. Air discharge holes nearby the leading edge feature cross-section larger than those for air discharge at the centre between leading and trailing edges.
EFFECT: higher cooling efficiency.
13 cl, 3 dwg
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